The HK1609 time relay is a fully assembled electronic module designed to control electrical loads using a negative -12 V trigger pulse. It operates as a pulse-activated timer with an adjustable ON time.
When power is applied, the module remains in standby mode waiting for a trigger pulse. Upon receiving a negative -12 V pulse, the relay switches ON and remains active for the preset time. After the time expires, the relay switches OFF and returns to standby mode, waiting for a new trigger pulse.
If the trigger pulse duration exceeds the preset time, the relay remains ON and switches OFF immediately when the trigger pulse is removed. The relay can be activated again only by a new negative pulse.
The ON time is smoothly adjustable from 1 to 50 seconds using a trimmer potentiometer. A LED indicator shows the relay status.
The product is supplied as an assembled module without enclosure, intended for integration into automation systems, control panels, and custom housings.

Technical Specifications:
Operating principle: negative pulse activated time relay (-12 V).
ON time: 1 - 50 seconds.
Time adjustment: trimmer potentiometer.
Indication: LED for relay ON status.
Relay output:
- Normally Open contact (NO),
- Common contact (COM),
- Normally Closed contact (NC).
Relay ratings:
- 15 A / 125 V DC,
- 15 A / 24 V DC or AC,
- 10 A / 250 V AC.
Supply voltage: 10 - 14 V DC.
Current consumption:
- relay OFF: 8 mA,
- relay ON: 48 mA.
PCB dimensions: 49 x 29 mm.

This product is a fully assembled module.
It is also available as a boxed finished product - Product code 1589 (separate product).